Aquarium Service Company

I've not used one.
Perhaps you could also try asking at your LFS to see if the company charges a fair price - sometimes they know the different companies in the area.

I've seen adverts for pet/house sitters - I wonder if you were to choose one with fishkeeping experience, might that be an alternative option for you? They may not have specific experience in decor changes, though, but maybe you have the scope to ask that. Having said that, I think the best option is the local company with professional expertise in that area, and LF's suggestion is a good plan.

yea but I am on the east coast.

yea I will have a word, found a local company but being bank holiday can't get hold of anyone.

I reckon it took me the best part of 30 hours (if not more) of my time. And I didn't buy anything new, just reused everything. (Except for a coconut. Which I bought from the supermarket and hasn't gone into the tank yet)

I did add more plants after sorting my substrate, but that's because I couldn't stop tinkering. They didn't replace any thing.

Please don't use white sand. White does not occur anywhere in nature and it stresses the fish because they have evolved over dark 'substrate'. Their bodies are coloured so that when you look down on them they are dark so they don't stand out against the substrate. If you look from underneath, they are light coloured so they don't stand out against the sky. A fish that stands out is much more likely to be seen and eaten. A fish that blends in is more likely to live longer.
Sand coloured substrate is better for fish, and brown/black is even better.

The same applies to gravel.

checked again it's not pure white but a natural colour.

I used children's play sand and although it is natural sand coloured , it actually looks quite white underneath my aquarium lights. Unless it's dirty.

so went down my LFS and got him to come out to do it, removed the multi coloured gravel dump all the plants and started again, so now on sand most of new plants in others out of stock being done in 2 weeks, he cleaned all the tank internal filter including pump, all the external filter pipes heaters tank cover lights, looks nice and strange looks bigger.

yea its a 5 foot so quite big, but  now because he has minimized it lot of open spaces. more eye catching as well.